Permutation adjuster



Feb. 24, 1925.

L. BURKE PERMUTATION ADJUSTER Filed Jan. 5o, 1924 IM/vento@ APatentedFeb. 24, 1925.

UNITED STATES LOUIS BURKE, OF NEW YORK, N. Y.

PERMUTATION ADJUs'rER.

Application led January 30, 1924. Serial ENO. 689,520.

T o all whom it may concern.'

Be it known that I` LOU-Is BURKE, a resident of New York, New YorkCounty', and Xew York State, and a citizen of the United States, haveinvented certain new and useful Improvements 4in Permutation Adj usters.of which the following is a specification.

This invention relates to permutation adjusters adapted to bring aboutthe Contact or to influence a magnetic field to a greater or lessdegree, to strengthen or decrease radio waves or for similar purposes.The object of the invention is to provide intermediate means or gearingbetween dials so that when one is rotated the other may be also rotatedat a much slower rate so that very delicate adjustments can be made.

These and other details and objects of the invention are more fullydescribed in the following specification, set forth in the appendedclaims and illustrated in the accompanying drawings, whereinz Figure 1is a face vlew of the improved' permutation dials.

Fig. 2 is a face view of the lower dial detached. e

Fig. 3 is an interior view of the upper and smaller dial.

Figa is a vertical sectional view on the line 4-4 of Fig. 3. y f

Fig. 5 is a vertical sectional view showing a modified construction.

lThis device is applicable to many forms of scaled dials adapted to beset to secure delicate and accurate readings, measurements oradjustments and as shown in the drawings and as hereinafter described,it is best adapted for application to the attuning shaft of a radio wavereceiver.

In addition to the dial 1() that is common to these instruments a seconddial 11 is provided and mounted concentric with the first dial. Thesecond or upper dial comprises a box or housing of depending ange 12that lits overa hub 13 on the dial 10 that has a circumferential groove14 adapted to receive the inner ends of screws 15 which permits of theindependent rotation of the dials while they are secured together.

At the center of dial 10. is vsecured the attuning shaft 16whileythrough a central opening in the dial 11 extends a stem 17 of aknob 18 that also carries at its lower end the pinion 19.v This pinion19 meshes with an idler 2O journalled on a stud on the lower side of thedial and which drives a pinion 21 that is secured to a` beveied gear 22,the two being journaled in the bracket 23 and the latter gear wheel 22meshes with a similar wheel 24 secured on a shaft that is journaled inal bracket 25 and also carries the worm 26.

On the upper face of dial 13 are a series of pegs 27 arranged circularlyand that are concentric with' the opening in which the shaft 16 islocated and these pegs act as teeth which the worm 26 engages so thatwhen the knob 18 is rotated the train of gear wheels above describedwill eventually rotate the dial 10, but on account of the disproportionof the wheels 20 and 21 and the worm 26 and the pegs 27 the speed isgeared down considerably.

If, therefore, the dials 10 and 11 are initially set at the same numberand it is desired to rotate the shaft 16 or arms thereon, a very smallbut predetermined distance,

the knob 18 is turned and the disc 10 is slowly moved until thepredetermined reading or number reaches the desired point.

To accomplish this adjustment the box 12 must be held by one hand, whilethe other manipulates the knob, the original setting of the base dialliavingf'been made by the said boX and all of the parts moved together.

In the modified form gearing to drive the worm 26 is identical with thatalready described but the dial 13 has an upright iange 28 havinghorizontally disposed pegs 29 and the location of the worm 26 ensuresits engagement with the pegs to rotate the dial 13.

It is obvious that the parts may be other- .wise arranged or modifiedwithout departing from the essential features above described or fromthe scope of the appended claims. z

What I claim as new is:

1. In permutation adjusters, the combination of a dial comprising abase, a second dial comprising a box-like housing, means for securingthe dials together and permitting independent movement, gearing withinthe box and adapted to cause one of the dials shown in Fig. 5 the tomove the other, and a knob outside of the box adapted to actuate thegearing to move one dial independently.y

2. In permutation adjusters, the combination of a dial having ascale,comprising a base and carrying a shaft, a second dial havlng asimilar scale as the first and comprising a housing, means connectingthe dials so as to permit independent action, gearing within the housingand adapted to rotate the dials together, and a knob outside of thehousing adapted to actuate the gearing.

3. ln permutation adjusters, the combination of a dial secured to theend of a shaft,

a smaller dial having a housing that is secured to the rst dial, a knobhaving a stem adapted to pass through an opening in the smaller dial, apinion on the inner end of the stem, teeth on the first dial, andintermediate gearing between the pinion and the teeth adapted to causethedials to move together or to rotate the larger dial only When theknob is turned.

4. In permutation adjusters, the combinationof a shaft, a dial securedto the shaft,

,a second dial having a depending flange to constitute a housing, meansfor swivelling the housing to the first dial, teeth on the inner face ofthe irst dial, a Worm gearing with said teeth, a stem having a knob onits outer end and a pinion on its inner end and journaled in the seconddial, and intermediate gearing between thepinion and the Worm andadapted to cause the dials to move together or to move the first dialonly when actuated by the knob. Y

ln testimony whereof l hereuntoatix my signature.

LOUIS BURKE.

